1 // SPDX-License-Identifier: GPL-2.0+ 2 /* Framework for finding and configuring PHYs. 3 * Also contains generic PHY driver 4 * 5 * Author: Andy Fleming 6 * 7 * Copyright (c) 2004 Freescale Semiconductor, Inc. 8 */ 9 10 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 11 12 #include <linux/kernel.h> 13 #include <linux/string.h> 14 #include <linux/errno.h> 15 #include <linux/unistd.h> 16 #include <linux/slab.h> 17 #include <linux/interrupt.h> 18 #include <linux/init.h> 19 #include <linux/delay.h> 20 #include <linux/netdevice.h> 21 #include <linux/etherdevice.h> 22 #include <linux/skbuff.h> 23 #include <linux/mm.h> 24 #include <linux/module.h> 25 #include <linux/mii.h> 26 #include <linux/ethtool.h> 27 #include <linux/bitmap.h> 28 #include <linux/phy.h> 29 #include <linux/phy_led_triggers.h> 30 #include <linux/sfp.h> 31 #include <linux/mdio.h> 32 #include <linux/io.h> 33 #include <linux/uaccess.h> 34 35 MODULE_DESCRIPTION("PHY library"); 36 MODULE_AUTHOR("Andy Fleming"); 37 MODULE_LICENSE("GPL"); 38 39 __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_basic_features) __ro_after_init; 40 EXPORT_SYMBOL_GPL(phy_basic_features); 41 42 __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_basic_t1_features) __ro_after_init; 43 EXPORT_SYMBOL_GPL(phy_basic_t1_features); 44 45 __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_gbit_features) __ro_after_init; 46 EXPORT_SYMBOL_GPL(phy_gbit_features); 47 48 __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_gbit_fibre_features) __ro_after_init; 49 EXPORT_SYMBOL_GPL(phy_gbit_fibre_features); 50 51 __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_gbit_all_ports_features) __ro_after_init; 52 EXPORT_SYMBOL_GPL(phy_gbit_all_ports_features); 53 54 __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_10gbit_features) __ro_after_init; 55 EXPORT_SYMBOL_GPL(phy_10gbit_features); 56 57 __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_10gbit_fec_features) __ro_after_init; 58 EXPORT_SYMBOL_GPL(phy_10gbit_fec_features); 59 60 const int phy_basic_ports_array[3] = { 61 ETHTOOL_LINK_MODE_Autoneg_BIT, 62 ETHTOOL_LINK_MODE_TP_BIT, 63 ETHTOOL_LINK_MODE_MII_BIT, 64 }; 65 EXPORT_SYMBOL_GPL(phy_basic_ports_array); 66 67 const int phy_fibre_port_array[1] = { 68 ETHTOOL_LINK_MODE_FIBRE_BIT, 69 }; 70 EXPORT_SYMBOL_GPL(phy_fibre_port_array); 71 72 const int phy_all_ports_features_array[7] = { 73 ETHTOOL_LINK_MODE_Autoneg_BIT, 74 ETHTOOL_LINK_MODE_TP_BIT, 75 ETHTOOL_LINK_MODE_MII_BIT, 76 ETHTOOL_LINK_MODE_FIBRE_BIT, 77 ETHTOOL_LINK_MODE_AUI_BIT, 78 ETHTOOL_LINK_MODE_BNC_BIT, 79 ETHTOOL_LINK_MODE_Backplane_BIT, 80 }; 81 EXPORT_SYMBOL_GPL(phy_all_ports_features_array); 82 83 const int phy_10_100_features_array[4] = { 84 ETHTOOL_LINK_MODE_10baseT_Half_BIT, 85 ETHTOOL_LINK_MODE_10baseT_Full_BIT, 86 ETHTOOL_LINK_MODE_100baseT_Half_BIT, 87 ETHTOOL_LINK_MODE_100baseT_Full_BIT, 88 }; 89 EXPORT_SYMBOL_GPL(phy_10_100_features_array); 90 91 const int phy_basic_t1_features_array[2] = { 92 ETHTOOL_LINK_MODE_TP_BIT, 93 ETHTOOL_LINK_MODE_100baseT1_Full_BIT, 94 }; 95 EXPORT_SYMBOL_GPL(phy_basic_t1_features_array); 96 97 const int phy_gbit_features_array[2] = { 98 ETHTOOL_LINK_MODE_1000baseT_Half_BIT, 99 ETHTOOL_LINK_MODE_1000baseT_Full_BIT, 100 }; 101 EXPORT_SYMBOL_GPL(phy_gbit_features_array); 102 103 const int phy_10gbit_features_array[1] = { 104 ETHTOOL_LINK_MODE_10000baseT_Full_BIT, 105 }; 106 EXPORT_SYMBOL_GPL(phy_10gbit_features_array); 107 108 const int phy_10gbit_fec_features_array[1] = { 109 ETHTOOL_LINK_MODE_10000baseR_FEC_BIT, 110 }; 111 EXPORT_SYMBOL_GPL(phy_10gbit_fec_features_array); 112 113 __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_10gbit_full_features) __ro_after_init; 114 EXPORT_SYMBOL_GPL(phy_10gbit_full_features); 115 116 static const int phy_10gbit_full_features_array[] = { 117 ETHTOOL_LINK_MODE_10baseT_Full_BIT, 118 ETHTOOL_LINK_MODE_100baseT_Full_BIT, 119 ETHTOOL_LINK_MODE_1000baseT_Full_BIT, 120 ETHTOOL_LINK_MODE_10000baseT_Full_BIT, 121 }; 122 123 static void features_init(void) 124 { 125 /* 10/100 half/full*/ 126 linkmode_set_bit_array(phy_basic_ports_array, 127 ARRAY_SIZE(phy_basic_ports_array), 128 phy_basic_features); 129 linkmode_set_bit_array(phy_10_100_features_array, 130 ARRAY_SIZE(phy_10_100_features_array), 131 phy_basic_features); 132 133 /* 100 full, TP */ 134 linkmode_set_bit_array(phy_basic_t1_features_array, 135 ARRAY_SIZE(phy_basic_t1_features_array), 136 phy_basic_t1_features); 137 138 /* 10/100 half/full + 1000 half/full */ 139 linkmode_set_bit_array(phy_basic_ports_array, 140 ARRAY_SIZE(phy_basic_ports_array), 141 phy_gbit_features); 142 linkmode_set_bit_array(phy_10_100_features_array, 143 ARRAY_SIZE(phy_10_100_features_array), 144 phy_gbit_features); 145 linkmode_set_bit_array(phy_gbit_features_array, 146 ARRAY_SIZE(phy_gbit_features_array), 147 phy_gbit_features); 148 149 /* 10/100 half/full + 1000 half/full + fibre*/ 150 linkmode_set_bit_array(phy_basic_ports_array, 151 ARRAY_SIZE(phy_basic_ports_array), 152 phy_gbit_fibre_features); 153 linkmode_set_bit_array(phy_10_100_features_array, 154 ARRAY_SIZE(phy_10_100_features_array), 155 phy_gbit_fibre_features); 156 linkmode_set_bit_array(phy_gbit_features_array, 157 ARRAY_SIZE(phy_gbit_features_array), 158 phy_gbit_fibre_features); 159 linkmode_set_bit_array(phy_fibre_port_array, 160 ARRAY_SIZE(phy_fibre_port_array), 161 phy_gbit_fibre_features); 162 163 /* 10/100 half/full + 1000 half/full + TP/MII/FIBRE/AUI/BNC/Backplane*/ 164 linkmode_set_bit_array(phy_all_ports_features_array, 165 ARRAY_SIZE(phy_all_ports_features_array), 166 phy_gbit_all_ports_features); 167 linkmode_set_bit_array(phy_10_100_features_array, 168 ARRAY_SIZE(phy_10_100_features_array), 169 phy_gbit_all_ports_features); 170 linkmode_set_bit_array(phy_gbit_features_array, 171 ARRAY_SIZE(phy_gbit_features_array), 172 phy_gbit_all_ports_features); 173 174 /* 10/100 half/full + 1000 half/full + 10G full*/ 175 linkmode_set_bit_array(phy_all_ports_features_array, 176 ARRAY_SIZE(phy_all_ports_features_array), 177 phy_10gbit_features); 178 linkmode_set_bit_array(phy_10_100_features_array, 179 ARRAY_SIZE(phy_10_100_features_array), 180 phy_10gbit_features); 181 linkmode_set_bit_array(phy_gbit_features_array, 182 ARRAY_SIZE(phy_gbit_features_array), 183 phy_10gbit_features); 184 linkmode_set_bit_array(phy_10gbit_features_array, 185 ARRAY_SIZE(phy_10gbit_features_array), 186 phy_10gbit_features); 187 188 /* 10/100/1000/10G full */ 189 linkmode_set_bit_array(phy_all_ports_features_array, 190 ARRAY_SIZE(phy_all_ports_features_array), 191 phy_10gbit_full_features); 192 linkmode_set_bit_array(phy_10gbit_full_features_array, 193 ARRAY_SIZE(phy_10gbit_full_features_array), 194 phy_10gbit_full_features); 195 /* 10G FEC only */ 196 linkmode_set_bit_array(phy_10gbit_fec_features_array, 197 ARRAY_SIZE(phy_10gbit_fec_features_array), 198 phy_10gbit_fec_features); 199 } 200 201 void phy_device_free(struct phy_device *phydev) 202 { 203 put_device(&phydev->mdio.dev); 204 } 205 EXPORT_SYMBOL(phy_device_free); 206 207 static void phy_mdio_device_free(struct mdio_device *mdiodev) 208 { 209 struct phy_device *phydev; 210 211 phydev = container_of(mdiodev, struct phy_device, mdio); 212 phy_device_free(phydev); 213 } 214 215 static void phy_device_release(struct device *dev) 216 { 217 kfree(to_phy_device(dev)); 218 } 219 220 static void phy_mdio_device_remove(struct mdio_device *mdiodev) 221 { 222 struct phy_device *phydev; 223 224 phydev = container_of(mdiodev, struct phy_device, mdio); 225 phy_device_remove(phydev); 226 } 227 228 static struct phy_driver genphy_driver; 229 extern struct phy_driver genphy_c45_driver; 230 231 static LIST_HEAD(phy_fixup_list); 232 static DEFINE_MUTEX(phy_fixup_lock); 233 234 #ifdef CONFIG_PM 235 static bool mdio_bus_phy_may_suspend(struct phy_device *phydev) 236 { 237 struct device_driver *drv = phydev->mdio.dev.driver; 238 struct phy_driver *phydrv = to_phy_driver(drv); 239 struct net_device *netdev = phydev->attached_dev; 240 241 if (!drv || !phydrv->suspend) 242 return false; 243 244 /* PHY not attached? May suspend if the PHY has not already been 245 * suspended as part of a prior call to phy_disconnect() -> 246 * phy_detach() -> phy_suspend() because the parent netdev might be the 247 * MDIO bus driver and clock gated at this point. 248 */ 249 if (!netdev) 250 goto out; 251 252 if (netdev->wol_enabled) 253 return false; 254 255 /* As long as not all affected network drivers support the 256 * wol_enabled flag, let's check for hints that WoL is enabled. 257 * Don't suspend PHY if the attached netdev parent may wake up. 258 * The parent may point to a PCI device, as in tg3 driver. 259 */ 260 if (netdev->dev.parent && device_may_wakeup(netdev->dev.parent)) 261 return false; 262 263 /* Also don't suspend PHY if the netdev itself may wakeup. This 264 * is the case for devices w/o underlaying pwr. mgmt. aware bus, 265 * e.g. SoC devices. 266 */ 267 if (device_may_wakeup(&netdev->dev)) 268 return false; 269 270 out: 271 return !phydev->suspended; 272 } 273 274 static int mdio_bus_phy_suspend(struct device *dev) 275 { 276 struct phy_device *phydev = to_phy_device(dev); 277 278 /* We must stop the state machine manually, otherwise it stops out of 279 * control, possibly with the phydev->lock held. Upon resume, netdev 280 * may call phy routines that try to grab the same lock, and that may 281 * lead to a deadlock. 282 */ 283 if (phydev->attached_dev && phydev->adjust_link) 284 phy_stop_machine(phydev); 285 286 if (!mdio_bus_phy_may_suspend(phydev)) 287 return 0; 288 289 phydev->suspended_by_mdio_bus = 1; 290 291 return phy_suspend(phydev); 292 } 293 294 static int mdio_bus_phy_resume(struct device *dev) 295 { 296 struct phy_device *phydev = to_phy_device(dev); 297 int ret; 298 299 if (!phydev->suspended_by_mdio_bus) 300 goto no_resume; 301 302 phydev->suspended_by_mdio_bus = 0; 303 304 ret = phy_resume(phydev); 305 if (ret < 0) 306 return ret; 307 308 no_resume: 309 if (phydev->attached_dev && phydev->adjust_link) 310 phy_start_machine(phydev); 311 312 return 0; 313 } 314 315 static int mdio_bus_phy_restore(struct device *dev) 316 { 317 struct phy_device *phydev = to_phy_device(dev); 318 struct net_device *netdev = phydev->attached_dev; 319 int ret; 320 321 if (!netdev) 322 return 0; 323 324 ret = phy_init_hw(phydev); 325 if (ret < 0) 326 return ret; 327 328 if (phydev->attached_dev && phydev->adjust_link) 329 phy_start_machine(phydev); 330 331 return 0; 332 } 333 334 static const struct dev_pm_ops mdio_bus_phy_pm_ops = { 335 .suspend = mdio_bus_phy_suspend, 336 .resume = mdio_bus_phy_resume, 337 .freeze = mdio_bus_phy_suspend, 338 .thaw = mdio_bus_phy_resume, 339 .restore = mdio_bus_phy_restore, 340 }; 341 342 #define MDIO_BUS_PHY_PM_OPS (&mdio_bus_phy_pm_ops) 343 344 #else 345 346 #define MDIO_BUS_PHY_PM_OPS NULL 347 348 #endif /* CONFIG_PM */ 349 350 /** 351 * phy_register_fixup - creates a new phy_fixup and adds it to the list 352 * @bus_id: A string which matches phydev->mdio.dev.bus_id (or PHY_ANY_ID) 353 * @phy_uid: Used to match against phydev->phy_id (the UID of the PHY) 354 * It can also be PHY_ANY_UID 355 * @phy_uid_mask: Applied to phydev->phy_id and fixup->phy_uid before 356 * comparison 357 * @run: The actual code to be run when a matching PHY is found 358 */ 359 int phy_register_fixup(const char *bus_id, u32 phy_uid, u32 phy_uid_mask, 360 int (*run)(struct phy_device *)) 361 { 362 struct phy_fixup *fixup = kzalloc(sizeof(*fixup), GFP_KERNEL); 363 364 if (!fixup) 365 return -ENOMEM; 366 367 strlcpy(fixup->bus_id, bus_id, sizeof(fixup->bus_id)); 368 fixup->phy_uid = phy_uid; 369 fixup->phy_uid_mask = phy_uid_mask; 370 fixup->run = run; 371 372 mutex_lock(&phy_fixup_lock); 373 list_add_tail(&fixup->list, &phy_fixup_list); 374 mutex_unlock(&phy_fixup_lock); 375 376 return 0; 377 } 378 EXPORT_SYMBOL(phy_register_fixup); 379 380 /* Registers a fixup to be run on any PHY with the UID in phy_uid */ 381 int phy_register_fixup_for_uid(u32 phy_uid, u32 phy_uid_mask, 382 int (*run)(struct phy_device *)) 383 { 384 return phy_register_fixup(PHY_ANY_ID, phy_uid, phy_uid_mask, run); 385 } 386 EXPORT_SYMBOL(phy_register_fixup_for_uid); 387 388 /* Registers a fixup to be run on the PHY with id string bus_id */ 389 int phy_register_fixup_for_id(const char *bus_id, 390 int (*run)(struct phy_device *)) 391 { 392 return phy_register_fixup(bus_id, PHY_ANY_UID, 0xffffffff, run); 393 } 394 EXPORT_SYMBOL(phy_register_fixup_for_id); 395 396 /** 397 * phy_unregister_fixup - remove a phy_fixup from the list 398 * @bus_id: A string matches fixup->bus_id (or PHY_ANY_ID) in phy_fixup_list 399 * @phy_uid: A phy id matches fixup->phy_id (or PHY_ANY_UID) in phy_fixup_list 400 * @phy_uid_mask: Applied to phy_uid and fixup->phy_uid before comparison 401 */ 402 int phy_unregister_fixup(const char *bus_id, u32 phy_uid, u32 phy_uid_mask) 403 { 404 struct list_head *pos, *n; 405 struct phy_fixup *fixup; 406 int ret; 407 408 ret = -ENODEV; 409 410 mutex_lock(&phy_fixup_lock); 411 list_for_each_safe(pos, n, &phy_fixup_list) { 412 fixup = list_entry(pos, struct phy_fixup, list); 413 414 if ((!strcmp(fixup->bus_id, bus_id)) && 415 ((fixup->phy_uid & phy_uid_mask) == 416 (phy_uid & phy_uid_mask))) { 417 list_del(&fixup->list); 418 kfree(fixup); 419 ret = 0; 420 break; 421 } 422 } 423 mutex_unlock(&phy_fixup_lock); 424 425 return ret; 426 } 427 EXPORT_SYMBOL(phy_unregister_fixup); 428 429 /* Unregisters a fixup of any PHY with the UID in phy_uid */ 430 int phy_unregister_fixup_for_uid(u32 phy_uid, u32 phy_uid_mask) 431 { 432 return phy_unregister_fixup(PHY_ANY_ID, phy_uid, phy_uid_mask); 433 } 434 EXPORT_SYMBOL(phy_unregister_fixup_for_uid); 435 436 /* Unregisters a fixup of the PHY with id string bus_id */ 437 int phy_unregister_fixup_for_id(const char *bus_id) 438 { 439 return phy_unregister_fixup(bus_id, PHY_ANY_UID, 0xffffffff); 440 } 441 EXPORT_SYMBOL(phy_unregister_fixup_for_id); 442 443 /* Returns 1 if fixup matches phydev in bus_id and phy_uid. 444 * Fixups can be set to match any in one or more fields. 445 */ 446 static int phy_needs_fixup(struct phy_device *phydev, struct phy_fixup *fixup) 447 { 448 if (strcmp(fixup->bus_id, phydev_name(phydev)) != 0) 449 if (strcmp(fixup->bus_id, PHY_ANY_ID) != 0) 450 return 0; 451 452 if ((fixup->phy_uid & fixup->phy_uid_mask) != 453 (phydev->phy_id & fixup->phy_uid_mask)) 454 if (fixup->phy_uid != PHY_ANY_UID) 455 return 0; 456 457 return 1; 458 } 459 460 /* Runs any matching fixups for this phydev */ 461 static int phy_scan_fixups(struct phy_device *phydev) 462 { 463 struct phy_fixup *fixup; 464 465 mutex_lock(&phy_fixup_lock); 466 list_for_each_entry(fixup, &phy_fixup_list, list) { 467 if (phy_needs_fixup(phydev, fixup)) { 468 int err = fixup->run(phydev); 469 470 if (err < 0) { 471 mutex_unlock(&phy_fixup_lock); 472 return err; 473 } 474 phydev->has_fixups = true; 475 } 476 } 477 mutex_unlock(&phy_fixup_lock); 478 479 return 0; 480 } 481 482 static int phy_bus_match(struct device *dev, struct device_driver *drv) 483 { 484 struct phy_device *phydev = to_phy_device(dev); 485 struct phy_driver *phydrv = to_phy_driver(drv); 486 const int num_ids = ARRAY_SIZE(phydev->c45_ids.device_ids); 487 int i; 488 489 if (!(phydrv->mdiodrv.flags & MDIO_DEVICE_IS_PHY)) 490 return 0; 491 492 if (phydrv->match_phy_device) 493 return phydrv->match_phy_device(phydev); 494 495 if (phydev->is_c45) { 496 for (i = 1; i < num_ids; i++) { 497 if (phydev->c45_ids.device_ids[i] == 0xffffffff) 498 continue; 499 500 if ((phydrv->phy_id & phydrv->phy_id_mask) == 501 (phydev->c45_ids.device_ids[i] & 502 phydrv->phy_id_mask)) 503 return 1; 504 } 505 return 0; 506 } else { 507 return (phydrv->phy_id & phydrv->phy_id_mask) == 508 (phydev->phy_id & phydrv->phy_id_mask); 509 } 510 } 511 512 static ssize_t 513 phy_id_show(struct device *dev, struct device_attribute *attr, char *buf) 514 { 515 struct phy_device *phydev = to_phy_device(dev); 516 517 return sprintf(buf, "0x%.8lx\n", (unsigned long)phydev->phy_id); 518 } 519 static DEVICE_ATTR_RO(phy_id); 520 521 static ssize_t 522 phy_interface_show(struct device *dev, struct device_attribute *attr, char *buf) 523 { 524 struct phy_device *phydev = to_phy_device(dev); 525 const char *mode = NULL; 526 527 if (phy_is_internal(phydev)) 528 mode = "internal"; 529 else 530 mode = phy_modes(phydev->interface); 531 532 return sprintf(buf, "%s\n", mode); 533 } 534 static DEVICE_ATTR_RO(phy_interface); 535 536 static ssize_t 537 phy_has_fixups_show(struct device *dev, struct device_attribute *attr, 538 char *buf) 539 { 540 struct phy_device *phydev = to_phy_device(dev); 541 542 return sprintf(buf, "%d\n", phydev->has_fixups); 543 } 544 static DEVICE_ATTR_RO(phy_has_fixups); 545 546 static struct attribute *phy_dev_attrs[] = { 547 &dev_attr_phy_id.attr, 548 &dev_attr_phy_interface.attr, 549 &dev_attr_phy_has_fixups.attr, 550 NULL, 551 }; 552 ATTRIBUTE_GROUPS(phy_dev); 553 554 static const struct device_type mdio_bus_phy_type = { 555 .name = "PHY", 556 .groups = phy_dev_groups, 557 .release = phy_device_release, 558 .pm = MDIO_BUS_PHY_PM_OPS, 559 }; 560 561 static int phy_request_driver_module(struct phy_device *dev, u32 phy_id) 562 { 563 int ret; 564 565 ret = request_module(MDIO_MODULE_PREFIX MDIO_ID_FMT, 566 MDIO_ID_ARGS(phy_id)); 567 /* We only check for failures in executing the usermode binary, 568 * not whether a PHY driver module exists for the PHY ID. 569 * Accept -ENOENT because this may occur in case no initramfs exists, 570 * then modprobe isn't available. 571 */ 572 if (IS_ENABLED(CONFIG_MODULES) && ret < 0 && ret != -ENOENT) { 573 phydev_err(dev, "error %d loading PHY driver module for ID 0x%08lx\n", 574 ret, (unsigned long)phy_id); 575 return ret; 576 } 577 578 return 0; 579 } 580 581 struct phy_device *phy_device_create(struct mii_bus *bus, int addr, u32 phy_id, 582 bool is_c45, 583 struct phy_c45_device_ids *c45_ids) 584 { 585 struct phy_device *dev; 586 struct mdio_device *mdiodev; 587 int ret = 0; 588 589 /* We allocate the device, and initialize the default values */ 590 dev = kzalloc(sizeof(*dev), GFP_KERNEL); 591 if (!dev) 592 return ERR_PTR(-ENOMEM); 593 594 mdiodev = &dev->mdio; 595 mdiodev->dev.parent = &bus->dev; 596 mdiodev->dev.bus = &mdio_bus_type; 597 mdiodev->dev.type = &mdio_bus_phy_type; 598 mdiodev->bus = bus; 599 mdiodev->bus_match = phy_bus_match; 600 mdiodev->addr = addr; 601 mdiodev->flags = MDIO_DEVICE_FLAG_PHY; 602 mdiodev->device_free = phy_mdio_device_free; 603 mdiodev->device_remove = phy_mdio_device_remove; 604 605 dev->speed = SPEED_UNKNOWN; 606 dev->duplex = DUPLEX_UNKNOWN; 607 dev->pause = 0; 608 dev->asym_pause = 0; 609 dev->link = 0; 610 dev->interface = PHY_INTERFACE_MODE_GMII; 611 612 dev->autoneg = AUTONEG_ENABLE; 613 614 dev->is_c45 = is_c45; 615 dev->phy_id = phy_id; 616 if (c45_ids) 617 dev->c45_ids = *c45_ids; 618 dev->irq = bus->irq[addr]; 619 dev_set_name(&mdiodev->dev, PHY_ID_FMT, bus->id, addr); 620 621 dev->state = PHY_DOWN; 622 623 mutex_init(&dev->lock); 624 INIT_DELAYED_WORK(&dev->state_queue, phy_state_machine); 625 626 /* Request the appropriate module unconditionally; don't 627 * bother trying to do so only if it isn't already loaded, 628 * because that gets complicated. A hotplug event would have 629 * done an unconditional modprobe anyway. 630 * We don't do normal hotplug because it won't work for MDIO 631 * -- because it relies on the device staying around for long 632 * enough for the driver to get loaded. With MDIO, the NIC 633 * driver will get bored and give up as soon as it finds that 634 * there's no driver _already_ loaded. 635 */ 636 if (is_c45 && c45_ids) { 637 const int num_ids = ARRAY_SIZE(c45_ids->device_ids); 638 int i; 639 640 for (i = 1; i < num_ids; i++) { 641 if (c45_ids->device_ids[i] == 0xffffffff) 642 continue; 643 644 ret = phy_request_driver_module(dev, 645 c45_ids->device_ids[i]); 646 if (ret) 647 break; 648 } 649 } else { 650 ret = phy_request_driver_module(dev, phy_id); 651 } 652 653 if (!ret) { 654 device_initialize(&mdiodev->dev); 655 } else { 656 kfree(dev); 657 dev = ERR_PTR(ret); 658 } 659 660 return dev; 661 } 662 EXPORT_SYMBOL(phy_device_create); 663 664 /* get_phy_c45_devs_in_pkg - reads a MMD's devices in package registers. 665 * @bus: the target MII bus 666 * @addr: PHY address on the MII bus 667 * @dev_addr: MMD address in the PHY. 668 * @devices_in_package: where to store the devices in package information. 669 * 670 * Description: reads devices in package registers of a MMD at @dev_addr 671 * from PHY at @addr on @bus. 672 * 673 * Returns: 0 on success, -EIO on failure. 674 */ 675 static int get_phy_c45_devs_in_pkg(struct mii_bus *bus, int addr, int dev_addr, 676 u32 *devices_in_package) 677 { 678 int phy_reg, reg_addr; 679 680 reg_addr = MII_ADDR_C45 | dev_addr << 16 | MDIO_DEVS2; 681 phy_reg = mdiobus_read(bus, addr, reg_addr); 682 if (phy_reg < 0) 683 return -EIO; 684 *devices_in_package = phy_reg << 16; 685 686 reg_addr = MII_ADDR_C45 | dev_addr << 16 | MDIO_DEVS1; 687 phy_reg = mdiobus_read(bus, addr, reg_addr); 688 if (phy_reg < 0) 689 return -EIO; 690 *devices_in_package |= phy_reg; 691 692 /* Bit 0 doesn't represent a device, it indicates c22 regs presence */ 693 *devices_in_package &= ~BIT(0); 694 695 return 0; 696 } 697 698 /** 699 * get_phy_c45_ids - reads the specified addr for its 802.3-c45 IDs. 700 * @bus: the target MII bus 701 * @addr: PHY address on the MII bus 702 * @phy_id: where to store the ID retrieved. 703 * @c45_ids: where to store the c45 ID information. 704 * 705 * If the PHY devices-in-package appears to be valid, it and the 706 * corresponding identifiers are stored in @c45_ids, zero is stored 707 * in @phy_id. Otherwise 0xffffffff is stored in @phy_id. Returns 708 * zero on success. 709 * 710 */ 711 static int get_phy_c45_ids(struct mii_bus *bus, int addr, u32 *phy_id, 712 struct phy_c45_device_ids *c45_ids) { 713 int phy_reg; 714 int i, reg_addr; 715 const int num_ids = ARRAY_SIZE(c45_ids->device_ids); 716 u32 *devs = &c45_ids->devices_in_package; 717 718 /* Find first non-zero Devices In package. Device zero is reserved 719 * for 802.3 c45 complied PHYs, so don't probe it at first. 720 */ 721 for (i = 1; i < num_ids && *devs == 0; i++) { 722 phy_reg = get_phy_c45_devs_in_pkg(bus, addr, i, devs); 723 if (phy_reg < 0) 724 return -EIO; 725 726 if ((*devs & 0x1fffffff) == 0x1fffffff) { 727 /* If mostly Fs, there is no device there, 728 * then let's continue to probe more, as some 729 * 10G PHYs have zero Devices In package, 730 * e.g. Cortina CS4315/CS4340 PHY. 731 */ 732 phy_reg = get_phy_c45_devs_in_pkg(bus, addr, 0, devs); 733 if (phy_reg < 0) 734 return -EIO; 735 /* no device there, let's get out of here */ 736 if ((*devs & 0x1fffffff) == 0x1fffffff) { 737 *phy_id = 0xffffffff; 738 return 0; 739 } else { 740 break; 741 } 742 } 743 } 744 745 /* Now probe Device Identifiers for each device present. */ 746 for (i = 1; i < num_ids; i++) { 747 if (!(c45_ids->devices_in_package & (1 << i))) 748 continue; 749 750 reg_addr = MII_ADDR_C45 | i << 16 | MII_PHYSID1; 751 phy_reg = mdiobus_read(bus, addr, reg_addr); 752 if (phy_reg < 0) 753 return -EIO; 754 c45_ids->device_ids[i] = phy_reg << 16; 755 756 reg_addr = MII_ADDR_C45 | i << 16 | MII_PHYSID2; 757 phy_reg = mdiobus_read(bus, addr, reg_addr); 758 if (phy_reg < 0) 759 return -EIO; 760 c45_ids->device_ids[i] |= phy_reg; 761 } 762 *phy_id = 0; 763 return 0; 764 } 765 766 /** 767 * get_phy_id - reads the specified addr for its ID. 768 * @bus: the target MII bus 769 * @addr: PHY address on the MII bus 770 * @phy_id: where to store the ID retrieved. 771 * @is_c45: If true the PHY uses the 802.3 clause 45 protocol 772 * @c45_ids: where to store the c45 ID information. 773 * 774 * Description: In the case of a 802.3-c22 PHY, reads the ID registers 775 * of the PHY at @addr on the @bus, stores it in @phy_id and returns 776 * zero on success. 777 * 778 * In the case of a 802.3-c45 PHY, get_phy_c45_ids() is invoked, and 779 * its return value is in turn returned. 780 * 781 */ 782 static int get_phy_id(struct mii_bus *bus, int addr, u32 *phy_id, 783 bool is_c45, struct phy_c45_device_ids *c45_ids) 784 { 785 int phy_reg; 786 787 if (is_c45) 788 return get_phy_c45_ids(bus, addr, phy_id, c45_ids); 789 790 /* Grab the bits from PHYIR1, and put them in the upper half */ 791 phy_reg = mdiobus_read(bus, addr, MII_PHYSID1); 792 if (phy_reg < 0) { 793 /* returning -ENODEV doesn't stop bus scanning */ 794 return (phy_reg == -EIO || phy_reg == -ENODEV) ? -ENODEV : -EIO; 795 } 796 797 *phy_id = phy_reg << 16; 798 799 /* Grab the bits from PHYIR2, and put them in the lower half */ 800 phy_reg = mdiobus_read(bus, addr, MII_PHYSID2); 801 if (phy_reg < 0) 802 return -EIO; 803 804 *phy_id |= phy_reg; 805 806 return 0; 807 } 808 809 /** 810 * get_phy_device - reads the specified PHY device and returns its @phy_device 811 * struct 812 * @bus: the target MII bus 813 * @addr: PHY address on the MII bus 814 * @is_c45: If true the PHY uses the 802.3 clause 45 protocol 815 * 816 * Description: Reads the ID registers of the PHY at @addr on the 817 * @bus, then allocates and returns the phy_device to represent it. 818 */ 819 struct phy_device *get_phy_device(struct mii_bus *bus, int addr, bool is_c45) 820 { 821 struct phy_c45_device_ids c45_ids; 822 u32 phy_id = 0; 823 int r; 824 825 c45_ids.devices_in_package = 0; 826 memset(c45_ids.device_ids, 0xff, sizeof(c45_ids.device_ids)); 827 828 r = get_phy_id(bus, addr, &phy_id, is_c45, &c45_ids); 829 if (r) 830 return ERR_PTR(r); 831 832 /* If the phy_id is mostly Fs, there is no device there */ 833 if ((phy_id & 0x1fffffff) == 0x1fffffff) 834 return ERR_PTR(-ENODEV); 835 836 return phy_device_create(bus, addr, phy_id, is_c45, &c45_ids); 837 } 838 EXPORT_SYMBOL(get_phy_device); 839 840 /** 841 * phy_device_register - Register the phy device on the MDIO bus 842 * @phydev: phy_device structure to be added to the MDIO bus 843 */ 844 int phy_device_register(struct phy_device *phydev) 845 { 846 int err; 847 848 err = mdiobus_register_device(&phydev->mdio); 849 if (err) 850 return err; 851 852 /* Deassert the reset signal */ 853 phy_device_reset(phydev, 0); 854 855 /* Run all of the fixups for this PHY */ 856 err = phy_scan_fixups(phydev); 857 if (err) { 858 phydev_err(phydev, "failed to initialize\n"); 859 goto out; 860 } 861 862 err = device_add(&phydev->mdio.dev); 863 if (err) { 864 phydev_err(phydev, "failed to add\n"); 865 goto out; 866 } 867 868 return 0; 869 870 out: 871 /* Assert the reset signal */ 872 phy_device_reset(phydev, 1); 873 874 mdiobus_unregister_device(&phydev->mdio); 875 return err; 876 } 877 EXPORT_SYMBOL(phy_device_register); 878 879 /** 880 * phy_device_remove - Remove a previously registered phy device from the MDIO bus 881 * @phydev: phy_device structure to remove 882 * 883 * This doesn't free the phy_device itself, it merely reverses the effects 884 * of phy_device_register(). Use phy_device_free() to free the device 885 * after calling this function. 886 */ 887 void phy_device_remove(struct phy_device *phydev) 888 { 889 if (phydev->mii_ts) 890 unregister_mii_timestamper(phydev->mii_ts); 891 892 device_del(&phydev->mdio.dev); 893 894 /* Assert the reset signal */ 895 phy_device_reset(phydev, 1); 896 897 mdiobus_unregister_device(&phydev->mdio); 898 } 899 EXPORT_SYMBOL(phy_device_remove); 900 901 /** 902 * phy_find_first - finds the first PHY device on the bus 903 * @bus: the target MII bus 904 */ 905 struct phy_device *phy_find_first(struct mii_bus *bus) 906 { 907 struct phy_device *phydev; 908 int addr; 909 910 for (addr = 0; addr < PHY_MAX_ADDR; addr++) { 911 phydev = mdiobus_get_phy(bus, addr); 912 if (phydev) 913 return phydev; 914 } 915 return NULL; 916 } 917 EXPORT_SYMBOL(phy_find_first); 918 919 static void phy_link_change(struct phy_device *phydev, bool up, bool do_carrier) 920 { 921 struct net_device *netdev = phydev->attached_dev; 922 923 if (do_carrier) { 924 if (up) 925 netif_carrier_on(netdev); 926 else 927 netif_carrier_off(netdev); 928 } 929 phydev->adjust_link(netdev); 930 if (phydev->mii_ts && phydev->mii_ts->link_state) 931 phydev->mii_ts->link_state(phydev->mii_ts, phydev); 932 } 933 934 /** 935 * phy_prepare_link - prepares the PHY layer to monitor link status 936 * @phydev: target phy_device struct 937 * @handler: callback function for link status change notifications 938 * 939 * Description: Tells the PHY infrastructure to handle the 940 * gory details on monitoring link status (whether through 941 * polling or an interrupt), and to call back to the 942 * connected device driver when the link status changes. 943 * If you want to monitor your own link state, don't call 944 * this function. 945 */ 946 static void phy_prepare_link(struct phy_device *phydev, 947 void (*handler)(struct net_device *)) 948 { 949 phydev->adjust_link = handler; 950 } 951 952 /** 953 * phy_connect_direct - connect an ethernet device to a specific phy_device 954 * @dev: the network device to connect 955 * @phydev: the pointer to the phy device 956 * @handler: callback function for state change notifications 957 * @interface: PHY device's interface 958 */ 959 int phy_connect_direct(struct net_device *dev, struct phy_device *phydev, 960 void (*handler)(struct net_device *), 961 phy_interface_t interface) 962 { 963 int rc; 964 965 if (!dev) 966 return -EINVAL; 967 968 rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface); 969 if (rc) 970 return rc; 971 972 phy_prepare_link(phydev, handler); 973 if (phy_interrupt_is_valid(phydev)) 974 phy_request_interrupt(phydev); 975 976 return 0; 977 } 978 EXPORT_SYMBOL(phy_connect_direct); 979 980 /** 981 * phy_connect - connect an ethernet device to a PHY device 982 * @dev: the network device to connect 983 * @bus_id: the id string of the PHY device to connect 984 * @handler: callback function for state change notifications 985 * @interface: PHY device's interface 986 * 987 * Description: Convenience function for connecting ethernet 988 * devices to PHY devices. The default behavior is for 989 * the PHY infrastructure to handle everything, and only notify 990 * the connected driver when the link status changes. If you 991 * don't want, or can't use the provided functionality, you may 992 * choose to call only the subset of functions which provide 993 * the desired functionality. 994 */ 995 struct phy_device *phy_connect(struct net_device *dev, const char *bus_id, 996 void (*handler)(struct net_device *), 997 phy_interface_t interface) 998 { 999 struct phy_device *phydev; 1000 struct device *d; 1001 int rc; 1002 1003 /* Search the list of PHY devices on the mdio bus for the 1004 * PHY with the requested name 1005 */ 1006 d = bus_find_device_by_name(&mdio_bus_type, NULL, bus_id); 1007 if (!d) { 1008 pr_err("PHY %s not found\n", bus_id); 1009 return ERR_PTR(-ENODEV); 1010 } 1011 phydev = to_phy_device(d); 1012 1013 rc = phy_connect_direct(dev, phydev, handler, interface); 1014 put_device(d); 1015 if (rc) 1016 return ERR_PTR(rc); 1017 1018 return phydev; 1019 } 1020 EXPORT_SYMBOL(phy_connect); 1021 1022 /** 1023 * phy_disconnect - disable interrupts, stop state machine, and detach a PHY 1024 * device 1025 * @phydev: target phy_device struct 1026 */ 1027 void phy_disconnect(struct phy_device *phydev) 1028 { 1029 if (phy_is_started(phydev)) 1030 phy_stop(phydev); 1031 1032 if (phy_interrupt_is_valid(phydev)) 1033 phy_free_interrupt(phydev); 1034 1035 phydev->adjust_link = NULL; 1036 1037 phy_detach(phydev); 1038 } 1039 EXPORT_SYMBOL(phy_disconnect); 1040 1041 /** 1042 * phy_poll_reset - Safely wait until a PHY reset has properly completed 1043 * @phydev: The PHY device to poll 1044 * 1045 * Description: According to IEEE 802.3, Section 2, Subsection 22.2.4.1.1, as 1046 * published in 2008, a PHY reset may take up to 0.5 seconds. The MII BMCR 1047 * register must be polled until the BMCR_RESET bit clears. 1048 * 1049 * Furthermore, any attempts to write to PHY registers may have no effect 1050 * or even generate MDIO bus errors until this is complete. 1051 * 1052 * Some PHYs (such as the Marvell 88E1111) don't entirely conform to the 1053 * standard and do not fully reset after the BMCR_RESET bit is set, and may 1054 * even *REQUIRE* a soft-reset to properly restart autonegotiation. In an 1055 * effort to support such broken PHYs, this function is separate from the 1056 * standard phy_init_hw() which will zero all the other bits in the BMCR 1057 * and reapply all driver-specific and board-specific fixups. 1058 */ 1059 static int phy_poll_reset(struct phy_device *phydev) 1060 { 1061 /* Poll until the reset bit clears (50ms per retry == 0.6 sec) */ 1062 unsigned int retries = 12; 1063 int ret; 1064 1065 do { 1066 msleep(50); 1067 ret = phy_read(phydev, MII_BMCR); 1068 if (ret < 0) 1069 return ret; 1070 } while (ret & BMCR_RESET && --retries); 1071 if (ret & BMCR_RESET) 1072 return -ETIMEDOUT; 1073 1074 /* Some chips (smsc911x) may still need up to another 1ms after the 1075 * BMCR_RESET bit is cleared before they are usable. 1076 */ 1077 msleep(1); 1078 return 0; 1079 } 1080 1081 int phy_init_hw(struct phy_device *phydev) 1082 { 1083 int ret = 0; 1084 1085 /* Deassert the reset signal */ 1086 phy_device_reset(phydev, 0); 1087 1088 if (!phydev->drv) 1089 return 0; 1090 1091 if (phydev->drv->soft_reset) 1092 ret = phydev->drv->soft_reset(phydev); 1093 1094 if (ret < 0) 1095 return ret; 1096 1097 ret = phy_scan_fixups(phydev); 1098 if (ret < 0) 1099 return ret; 1100 1101 if (phydev->drv->config_init) 1102 ret = phydev->drv->config_init(phydev); 1103 1104 return ret; 1105 } 1106 EXPORT_SYMBOL(phy_init_hw); 1107 1108 void phy_attached_info(struct phy_device *phydev) 1109 { 1110 phy_attached_print(phydev, NULL); 1111 } 1112 EXPORT_SYMBOL(phy_attached_info); 1113 1114 #define ATTACHED_FMT "attached PHY driver [%s] (mii_bus:phy_addr=%s, irq=%s)" 1115 char *phy_attached_info_irq(struct phy_device *phydev) 1116 { 1117 char *irq_str; 1118 char irq_num[8]; 1119 1120 switch(phydev->irq) { 1121 case PHY_POLL: 1122 irq_str = "POLL"; 1123 break; 1124 case PHY_IGNORE_INTERRUPT: 1125 irq_str = "IGNORE"; 1126 break; 1127 default: 1128 snprintf(irq_num, sizeof(irq_num), "%d", phydev->irq); 1129 irq_str = irq_num; 1130 break; 1131 } 1132 1133 return kasprintf(GFP_KERNEL, "%s", irq_str); 1134 } 1135 EXPORT_SYMBOL(phy_attached_info_irq); 1136 1137 void phy_attached_print(struct phy_device *phydev, const char *fmt, ...) 1138 { 1139 const char *drv_name = phydev->drv ? phydev->drv->name : "unbound"; 1140 char *irq_str = phy_attached_info_irq(phydev); 1141 1142 if (!fmt) { 1143 phydev_info(phydev, ATTACHED_FMT "\n", 1144 drv_name, phydev_name(phydev), 1145 irq_str); 1146 } else { 1147 va_list ap; 1148 1149 phydev_info(phydev, ATTACHED_FMT, 1150 drv_name, phydev_name(phydev), 1151 irq_str); 1152 1153 va_start(ap, fmt); 1154 vprintk(fmt, ap); 1155 va_end(ap); 1156 } 1157 kfree(irq_str); 1158 } 1159 EXPORT_SYMBOL(phy_attached_print); 1160 1161 static void phy_sysfs_create_links(struct phy_device *phydev) 1162 { 1163 struct net_device *dev = phydev->attached_dev; 1164 int err; 1165 1166 if (!dev) 1167 return; 1168 1169 err = sysfs_create_link(&phydev->mdio.dev.kobj, &dev->dev.kobj, 1170 "attached_dev"); 1171 if (err) 1172 return; 1173 1174 err = sysfs_create_link_nowarn(&dev->dev.kobj, 1175 &phydev->mdio.dev.kobj, 1176 "phydev"); 1177 if (err) { 1178 dev_err(&dev->dev, "could not add device link to %s err %d\n", 1179 kobject_name(&phydev->mdio.dev.kobj), 1180 err); 1181 /* non-fatal - some net drivers can use one netdevice 1182 * with more then one phy 1183 */ 1184 } 1185 1186 phydev->sysfs_links = true; 1187 } 1188 1189 static ssize_t 1190 phy_standalone_show(struct device *dev, struct device_attribute *attr, 1191 char *buf) 1192 { 1193 struct phy_device *phydev = to_phy_device(dev); 1194 1195 return sprintf(buf, "%d\n", !phydev->attached_dev); 1196 } 1197 static DEVICE_ATTR_RO(phy_standalone); 1198 1199 /** 1200 * phy_sfp_attach - attach the SFP bus to the PHY upstream network device 1201 * @upstream: pointer to the phy device 1202 * @bus: sfp bus representing cage being attached 1203 * 1204 * This is used to fill in the sfp_upstream_ops .attach member. 1205 */ 1206 void phy_sfp_attach(void *upstream, struct sfp_bus *bus) 1207 { 1208 struct phy_device *phydev = upstream; 1209 1210 if (phydev->attached_dev) 1211 phydev->attached_dev->sfp_bus = bus; 1212 phydev->sfp_bus_attached = true; 1213 } 1214 EXPORT_SYMBOL(phy_sfp_attach); 1215 1216 /** 1217 * phy_sfp_detach - detach the SFP bus from the PHY upstream network device 1218 * @upstream: pointer to the phy device 1219 * @bus: sfp bus representing cage being attached 1220 * 1221 * This is used to fill in the sfp_upstream_ops .detach member. 1222 */ 1223 void phy_sfp_detach(void *upstream, struct sfp_bus *bus) 1224 { 1225 struct phy_device *phydev = upstream; 1226 1227 if (phydev->attached_dev) 1228 phydev->attached_dev->sfp_bus = NULL; 1229 phydev->sfp_bus_attached = false; 1230 } 1231 EXPORT_SYMBOL(phy_sfp_detach); 1232 1233 /** 1234 * phy_sfp_probe - probe for a SFP cage attached to this PHY device 1235 * @phydev: Pointer to phy_device 1236 * @ops: SFP's upstream operations 1237 */ 1238 int phy_sfp_probe(struct phy_device *phydev, 1239 const struct sfp_upstream_ops *ops) 1240 { 1241 struct sfp_bus *bus; 1242 int ret; 1243 1244 if (phydev->mdio.dev.fwnode) { 1245 bus = sfp_bus_find_fwnode(phydev->mdio.dev.fwnode); 1246 if (IS_ERR(bus)) 1247 return PTR_ERR(bus); 1248 1249 phydev->sfp_bus = bus; 1250 1251 ret = sfp_bus_add_upstream(bus, phydev, ops); 1252 sfp_bus_put(bus); 1253 } 1254 return 0; 1255 } 1256 EXPORT_SYMBOL(phy_sfp_probe); 1257 1258 /** 1259 * phy_attach_direct - attach a network device to a given PHY device pointer 1260 * @dev: network device to attach 1261 * @phydev: Pointer to phy_device to attach 1262 * @flags: PHY device's dev_flags 1263 * @interface: PHY device's interface 1264 * 1265 * Description: Called by drivers to attach to a particular PHY 1266 * device. The phy_device is found, and properly hooked up 1267 * to the phy_driver. If no driver is attached, then a 1268 * generic driver is used. The phy_device is given a ptr to 1269 * the attaching device, and given a callback for link status 1270 * change. The phy_device is returned to the attaching driver. 1271 * This function takes a reference on the phy device. 1272 */ 1273 int phy_attach_direct(struct net_device *dev, struct phy_device *phydev, 1274 u32 flags, phy_interface_t interface) 1275 { 1276 struct mii_bus *bus = phydev->mdio.bus; 1277 struct device *d = &phydev->mdio.dev; 1278 struct module *ndev_owner = NULL; 1279 bool using_genphy = false; 1280 int err; 1281 1282 /* For Ethernet device drivers that register their own MDIO bus, we 1283 * will have bus->owner match ndev_mod, so we do not want to increment 1284 * our own module->refcnt here, otherwise we would not be able to 1285 * unload later on. 1286 */ 1287 if (dev) 1288 ndev_owner = dev->dev.parent->driver->owner; 1289 if (ndev_owner != bus->owner && !try_module_get(bus->owner)) { 1290 phydev_err(phydev, "failed to get the bus module\n"); 1291 return -EIO; 1292 } 1293 1294 get_device(d); 1295 1296 /* Assume that if there is no driver, that it doesn't 1297 * exist, and we should use the genphy driver. 1298 */ 1299 if (!d->driver) { 1300 if (phydev->is_c45) 1301 d->driver = &genphy_c45_driver.mdiodrv.driver; 1302 else 1303 d->driver = &genphy_driver.mdiodrv.driver; 1304 1305 using_genphy = true; 1306 } 1307 1308 if (!try_module_get(d->driver->owner)) { 1309 phydev_err(phydev, "failed to get the device driver module\n"); 1310 err = -EIO; 1311 goto error_put_device; 1312 } 1313 1314 if (using_genphy) { 1315 err = d->driver->probe(d); 1316 if (err >= 0) 1317 err = device_bind_driver(d); 1318 1319 if (err) 1320 goto error_module_put; 1321 } 1322 1323 if (phydev->attached_dev) { 1324 dev_err(&dev->dev, "PHY already attached\n"); 1325 err = -EBUSY; 1326 goto error; 1327 } 1328 1329 phydev->phy_link_change = phy_link_change; 1330 if (dev) { 1331 phydev->attached_dev = dev; 1332 dev->phydev = phydev; 1333 1334 if (phydev->sfp_bus_attached) 1335 dev->sfp_bus = phydev->sfp_bus; 1336 } 1337 1338 /* Some Ethernet drivers try to connect to a PHY device before 1339 * calling register_netdevice() -> netdev_register_kobject() and 1340 * does the dev->dev.kobj initialization. Here we only check for 1341 * success which indicates that the network device kobject is 1342 * ready. Once we do that we still need to keep track of whether 1343 * links were successfully set up or not for phy_detach() to 1344 * remove them accordingly. 1345 */ 1346 phydev->sysfs_links = false; 1347 1348 phy_sysfs_create_links(phydev); 1349 1350 if (!phydev->attached_dev) { 1351 err = sysfs_create_file(&phydev->mdio.dev.kobj, 1352 &dev_attr_phy_standalone.attr); 1353 if (err) 1354 phydev_err(phydev, "error creating 'phy_standalone' sysfs entry\n"); 1355 } 1356 1357 phydev->dev_flags |= flags; 1358 1359 phydev->interface = interface; 1360 1361 phydev->state = PHY_READY; 1362 1363 /* Initial carrier state is off as the phy is about to be 1364 * (re)initialized. 1365 */ 1366 if (dev) 1367 netif_carrier_off(phydev->attached_dev); 1368 1369 /* Do initial configuration here, now that 1370 * we have certain key parameters 1371 * (dev_flags and interface) 1372 */ 1373 err = phy_init_hw(phydev); 1374 if (err) 1375 goto error; 1376 1377 phy_resume(phydev); 1378 phy_led_triggers_register(phydev); 1379 1380 return err; 1381 1382 error: 1383 /* phy_detach() does all of the cleanup below */ 1384 phy_detach(phydev); 1385 return err; 1386 1387 error_module_put: 1388 module_put(d->driver->owner); 1389 error_put_device: 1390 put_device(d); 1391 if (ndev_owner != bus->owner) 1392 module_put(bus->owner); 1393 return err; 1394 } 1395 EXPORT_SYMBOL(phy_attach_direct); 1396 1397 /** 1398 * phy_attach - attach a network device to a particular PHY device 1399 * @dev: network device to attach 1400 * @bus_id: Bus ID of PHY device to attach 1401 * @interface: PHY device's interface 1402 * 1403 * Description: Same as phy_attach_direct() except that a PHY bus_id 1404 * string is passed instead of a pointer to a struct phy_device. 1405 */ 1406 struct phy_device *phy_attach(struct net_device *dev, const char *bus_id, 1407 phy_interface_t interface) 1408 { 1409 struct bus_type *bus = &mdio_bus_type; 1410 struct phy_device *phydev; 1411 struct device *d; 1412 int rc; 1413 1414 if (!dev) 1415 return ERR_PTR(-EINVAL); 1416 1417 /* Search the list of PHY devices on the mdio bus for the 1418 * PHY with the requested name 1419 */ 1420 d = bus_find_device_by_name(bus, NULL, bus_id); 1421 if (!d) { 1422 pr_err("PHY %s not found\n", bus_id); 1423 return ERR_PTR(-ENODEV); 1424 } 1425 phydev = to_phy_device(d); 1426 1427 rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface); 1428 put_device(d); 1429 if (rc) 1430 return ERR_PTR(rc); 1431 1432 return phydev; 1433 } 1434 EXPORT_SYMBOL(phy_attach); 1435 1436 static bool phy_driver_is_genphy_kind(struct phy_device *phydev, 1437 struct device_driver *driver) 1438 { 1439 struct device *d = &phydev->mdio.dev; 1440 bool ret = false; 1441 1442 if (!phydev->drv) 1443 return ret; 1444 1445 get_device(d); 1446 ret = d->driver == driver; 1447 put_device(d); 1448 1449 return ret; 1450 } 1451 1452 bool phy_driver_is_genphy(struct phy_device *phydev) 1453 { 1454 return phy_driver_is_genphy_kind(phydev, 1455 &genphy_driver.mdiodrv.driver); 1456 } 1457 EXPORT_SYMBOL_GPL(phy_driver_is_genphy); 1458 1459 bool phy_driver_is_genphy_10g(struct phy_device *phydev) 1460 { 1461 return phy_driver_is_genphy_kind(phydev, 1462 &genphy_c45_driver.mdiodrv.driver); 1463 } 1464 EXPORT_SYMBOL_GPL(phy_driver_is_genphy_10g); 1465 1466 /** 1467 * phy_detach - detach a PHY device from its network device 1468 * @phydev: target phy_device struct 1469 * 1470 * This detaches the phy device from its network device and the phy 1471 * driver, and drops the reference count taken in phy_attach_direct(). 1472 */ 1473 void phy_detach(struct phy_device *phydev) 1474 { 1475 struct net_device *dev = phydev->attached_dev; 1476 struct module *ndev_owner = NULL; 1477 struct mii_bus *bus; 1478 1479 if (phydev->sysfs_links) { 1480 if (dev) 1481 sysfs_remove_link(&dev->dev.kobj, "phydev"); 1482 sysfs_remove_link(&phydev->mdio.dev.kobj, "attached_dev"); 1483 } 1484 1485 if (!phydev->attached_dev) 1486 sysfs_remove_file(&phydev->mdio.dev.kobj, 1487 &dev_attr_phy_standalone.attr); 1488 1489 phy_suspend(phydev); 1490 if (dev) { 1491 phydev->attached_dev->phydev = NULL; 1492 phydev->attached_dev = NULL; 1493 } 1494 phydev->phylink = NULL; 1495 1496 phy_led_triggers_unregister(phydev); 1497 1498 module_put(phydev->mdio.dev.driver->owner); 1499 1500 /* If the device had no specific driver before (i.e. - it 1501 * was using the generic driver), we unbind the device 1502 * from the generic driver so that there's a chance a 1503 * real driver could be loaded 1504 */ 1505 if (phy_driver_is_genphy(phydev) || 1506 phy_driver_is_genphy_10g(phydev)) 1507 device_release_driver(&phydev->mdio.dev); 1508 1509 /* 1510 * The phydev might go away on the put_device() below, so avoid 1511 * a use-after-free bug by reading the underlying bus first. 1512 */ 1513 bus = phydev->mdio.bus; 1514 1515 put_device(&phydev->mdio.dev); 1516 if (dev) 1517 ndev_owner = dev->dev.parent->driver->owner; 1518 if (ndev_owner != bus->owner) 1519 module_put(bus->owner); 1520 1521 /* Assert the reset signal */ 1522 phy_device_reset(phydev, 1); 1523 } 1524 EXPORT_SYMBOL(phy_detach); 1525 1526 int phy_suspend(struct phy_device *phydev) 1527 { 1528 struct phy_driver *phydrv = to_phy_driver(phydev->mdio.dev.driver); 1529 struct net_device *netdev = phydev->attached_dev; 1530 struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL }; 1531 int ret = 0; 1532 1533 /* If the device has WOL enabled, we cannot suspend the PHY */ 1534 phy_ethtool_get_wol(phydev, &wol); 1535 if (wol.wolopts || (netdev && netdev->wol_enabled)) 1536 return -EBUSY; 1537 1538 if (phydev->drv && phydrv->suspend) 1539 ret = phydrv->suspend(phydev); 1540 1541 if (ret) 1542 return ret; 1543 1544 phydev->suspended = true; 1545 1546 return ret; 1547 } 1548 EXPORT_SYMBOL(phy_suspend); 1549 1550 int __phy_resume(struct phy_device *phydev) 1551 { 1552 struct phy_driver *phydrv = to_phy_driver(phydev->mdio.dev.driver); 1553 int ret = 0; 1554 1555 WARN_ON(!mutex_is_locked(&phydev->lock)); 1556 1557 if (phydev->drv && phydrv->resume) 1558 ret = phydrv->resume(phydev); 1559 1560 if (ret) 1561 return ret; 1562 1563 phydev->suspended = false; 1564 1565 return ret; 1566 } 1567 EXPORT_SYMBOL(__phy_resume); 1568 1569 int phy_resume(struct phy_device *phydev) 1570 { 1571 int ret; 1572 1573 mutex_lock(&phydev->lock); 1574 ret = __phy_resume(phydev); 1575 mutex_unlock(&phydev->lock); 1576 1577 return ret; 1578 } 1579 EXPORT_SYMBOL(phy_resume); 1580 1581 int phy_loopback(struct phy_device *phydev, bool enable) 1582 { 1583 struct phy_driver *phydrv = to_phy_driver(phydev->mdio.dev.driver); 1584 int ret = 0; 1585 1586 mutex_lock(&phydev->lock); 1587 1588 if (enable && phydev->loopback_enabled) { 1589 ret = -EBUSY; 1590 goto out; 1591 } 1592 1593 if (!enable && !phydev->loopback_enabled) { 1594 ret = -EINVAL; 1595 goto out; 1596 } 1597 1598 if (phydev->drv && phydrv->set_loopback) 1599 ret = phydrv->set_loopback(phydev, enable); 1600 else 1601 ret = -EOPNOTSUPP; 1602 1603 if (ret) 1604 goto out; 1605 1606 phydev->loopback_enabled = enable; 1607 1608 out: 1609 mutex_unlock(&phydev->lock); 1610 return ret; 1611 } 1612 EXPORT_SYMBOL(phy_loopback); 1613 1614 /** 1615 * phy_reset_after_clk_enable - perform a PHY reset if needed 1616 * @phydev: target phy_device struct 1617 * 1618 * Description: Some PHYs are known to need a reset after their refclk was 1619 * enabled. This function evaluates the flags and perform the reset if it's 1620 * needed. Returns < 0 on error, 0 if the phy wasn't reset and 1 if the phy 1621 * was reset. 1622 */ 1623 int phy_reset_after_clk_enable(struct phy_device *phydev) 1624 { 1625 if (!phydev || !phydev->drv) 1626 return -ENODEV; 1627 1628 if (phydev->drv->flags & PHY_RST_AFTER_CLK_EN) { 1629 phy_device_reset(phydev, 1); 1630 phy_device_reset(phydev, 0); 1631 return 1; 1632 } 1633 1634 return 0; 1635 } 1636 EXPORT_SYMBOL(phy_reset_after_clk_enable); 1637 1638 /* Generic PHY support and helper functions */ 1639 1640 /** 1641 * genphy_config_advert - sanitize and advertise auto-negotiation parameters 1642 * @phydev: target phy_device struct 1643 * 1644 * Description: Writes MII_ADVERTISE with the appropriate values, 1645 * after sanitizing the values to make sure we only advertise 1646 * what is supported. Returns < 0 on error, 0 if the PHY's advertisement 1647 * hasn't changed, and > 0 if it has changed. 1648 */ 1649 static int genphy_config_advert(struct phy_device *phydev) 1650 { 1651 int err, bmsr, changed = 0; 1652 u32 adv; 1653 1654 /* Only allow advertising what this PHY supports */ 1655 linkmode_and(phydev->advertising, phydev->advertising, 1656 phydev->supported); 1657 1658 adv = linkmode_adv_to_mii_adv_t(phydev->advertising); 1659 1660 /* Setup standard advertisement */ 1661 err = phy_modify_changed(phydev, MII_ADVERTISE, 1662 ADVERTISE_ALL | ADVERTISE_100BASE4 | 1663 ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM, 1664 adv); 1665 if (err < 0) 1666 return err; 1667 if (err > 0) 1668 changed = 1; 1669 1670 bmsr = phy_read(phydev, MII_BMSR); 1671 if (bmsr < 0) 1672 return bmsr; 1673 1674 /* Per 802.3-2008, Section 22.2.4.2.16 Extended status all 1675 * 1000Mbits/sec capable PHYs shall have the BMSR_ESTATEN bit set to a 1676 * logical 1. 1677 */ 1678 if (!(bmsr & BMSR_ESTATEN)) 1679 return changed; 1680 1681 adv = linkmode_adv_to_mii_ctrl1000_t(phydev->advertising); 1682 1683 err = phy_modify_changed(phydev, MII_CTRL1000, 1684 ADVERTISE_1000FULL | ADVERTISE_1000HALF, 1685 adv); 1686 if (err < 0) 1687 return err; 1688 if (err > 0) 1689 changed = 1; 1690 1691 return changed; 1692 } 1693 1694 /** 1695 * genphy_c37_config_advert - sanitize and advertise auto-negotiation parameters 1696 * @phydev: target phy_device struct 1697 * 1698 * Description: Writes MII_ADVERTISE with the appropriate values, 1699 * after sanitizing the values to make sure we only advertise 1700 * what is supported. Returns < 0 on error, 0 if the PHY's advertisement 1701 * hasn't changed, and > 0 if it has changed. This function is intended 1702 * for Clause 37 1000Base-X mode. 1703 */ 1704 static int genphy_c37_config_advert(struct phy_device *phydev) 1705 { 1706 u16 adv = 0; 1707 1708 /* Only allow advertising what this PHY supports */ 1709 linkmode_and(phydev->advertising, phydev->advertising, 1710 phydev->supported); 1711 1712 if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT, 1713 phydev->advertising)) 1714 adv |= ADVERTISE_1000XFULL; 1715 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT, 1716 phydev->advertising)) 1717 adv |= ADVERTISE_1000XPAUSE; 1718 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 1719 phydev->advertising)) 1720 adv |= ADVERTISE_1000XPSE_ASYM; 1721 1722 return phy_modify_changed(phydev, MII_ADVERTISE, 1723 ADVERTISE_1000XFULL | ADVERTISE_1000XPAUSE | 1724 ADVERTISE_1000XHALF | ADVERTISE_1000XPSE_ASYM, 1725 adv); 1726 } 1727 1728 /** 1729 * genphy_config_eee_advert - disable unwanted eee mode advertisement 1730 * @phydev: target phy_device struct 1731 * 1732 * Description: Writes MDIO_AN_EEE_ADV after disabling unsupported energy 1733 * efficent ethernet modes. Returns 0 if the PHY's advertisement hasn't 1734 * changed, and 1 if it has changed. 1735 */ 1736 int genphy_config_eee_advert(struct phy_device *phydev) 1737 { 1738 int err; 1739 1740 /* Nothing to disable */ 1741 if (!phydev->eee_broken_modes) 1742 return 0; 1743 1744 err = phy_modify_mmd_changed(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV, 1745 phydev->eee_broken_modes, 0); 1746 /* If the call failed, we assume that EEE is not supported */ 1747 return err < 0 ? 0 : err; 1748 } 1749 EXPORT_SYMBOL(genphy_config_eee_advert); 1750 1751 /** 1752 * genphy_setup_forced - configures/forces speed/duplex from @phydev 1753 * @phydev: target phy_device struct 1754 * 1755 * Description: Configures MII_BMCR to force speed/duplex 1756 * to the values in phydev. Assumes that the values are valid. 1757 * Please see phy_sanitize_settings(). 1758 */ 1759 int genphy_setup_forced(struct phy_device *phydev) 1760 { 1761 u16 ctl = 0; 1762 1763 phydev->pause = 0; 1764 phydev->asym_pause = 0; 1765 1766 if (SPEED_1000 == phydev->speed) 1767 ctl |= BMCR_SPEED1000; 1768 else if (SPEED_100 == phydev->speed) 1769 ctl |= BMCR_SPEED100; 1770 1771 if (DUPLEX_FULL == phydev->duplex) 1772 ctl |= BMCR_FULLDPLX; 1773 1774 return phy_modify(phydev, MII_BMCR, 1775 ~(BMCR_LOOPBACK | BMCR_ISOLATE | BMCR_PDOWN), ctl); 1776 } 1777 EXPORT_SYMBOL(genphy_setup_forced); 1778 1779 /** 1780 * genphy_restart_aneg - Enable and Restart Autonegotiation 1781 * @phydev: target phy_device struct 1782 */ 1783 int genphy_restart_aneg(struct phy_device *phydev) 1784 { 1785 /* Don't isolate the PHY if we're negotiating */ 1786 return phy_modify(phydev, MII_BMCR, BMCR_ISOLATE, 1787 BMCR_ANENABLE | BMCR_ANRESTART); 1788 } 1789 EXPORT_SYMBOL(genphy_restart_aneg); 1790 1791 /** 1792 * genphy_check_and_restart_aneg - Enable and restart auto-negotiation 1793 * @phydev: target phy_device struct 1794 * @restart: whether aneg restart is requested 1795 * 1796 * Check, and restart auto-negotiation if needed. 1797 */ 1798 int genphy_check_and_restart_aneg(struct phy_device *phydev, bool restart) 1799 { 1800 int ret; 1801 1802 if (!restart) { 1803 /* Advertisement hasn't changed, but maybe aneg was never on to 1804 * begin with? Or maybe phy was isolated? 1805 */ 1806 ret = phy_read(phydev, MII_BMCR); 1807 if (ret < 0) 1808 return ret; 1809 1810 if (!(ret & BMCR_ANENABLE) || (ret & BMCR_ISOLATE)) 1811 restart = true; 1812 } 1813 1814 if (restart) 1815 return genphy_restart_aneg(phydev); 1816 1817 return 0; 1818 } 1819 EXPORT_SYMBOL(genphy_check_and_restart_aneg); 1820 1821 /** 1822 * __genphy_config_aneg - restart auto-negotiation or write BMCR 1823 * @phydev: target phy_device struct 1824 * @changed: whether autoneg is requested 1825 * 1826 * Description: If auto-negotiation is enabled, we configure the 1827 * advertising, and then restart auto-negotiation. If it is not 1828 * enabled, then we write the BMCR. 1829 */ 1830 int __genphy_config_aneg(struct phy_device *phydev, bool changed) 1831 { 1832 int err; 1833 1834 if (genphy_config_eee_advert(phydev)) 1835 changed = true; 1836 1837 if (AUTONEG_ENABLE != phydev->autoneg) 1838 return genphy_setup_forced(phydev); 1839 1840 err = genphy_config_advert(phydev); 1841 if (err < 0) /* error */ 1842 return err; 1843 else if (err) 1844 changed = true; 1845 1846 return genphy_check_and_restart_aneg(phydev, changed); 1847 } 1848 EXPORT_SYMBOL(__genphy_config_aneg); 1849 1850 /** 1851 * genphy_c37_config_aneg - restart auto-negotiation or write BMCR 1852 * @phydev: target phy_device struct 1853 * 1854 * Description: If auto-negotiation is enabled, we configure the 1855 * advertising, and then restart auto-negotiation. If it is not 1856 * enabled, then we write the BMCR. This function is intended 1857 * for use with Clause 37 1000Base-X mode. 1858 */ 1859 int genphy_c37_config_aneg(struct phy_device *phydev) 1860 { 1861 int err, changed; 1862 1863 if (phydev->autoneg != AUTONEG_ENABLE) 1864 return genphy_setup_forced(phydev); 1865 1866 err = phy_modify(phydev, MII_BMCR, BMCR_SPEED1000 | BMCR_SPEED100, 1867 BMCR_SPEED1000); 1868 if (err) 1869 return err; 1870 1871 changed = genphy_c37_config_advert(phydev); 1872 if (changed < 0) /* error */ 1873 return changed; 1874 1875 if (!changed) { 1876 /* Advertisement hasn't changed, but maybe aneg was never on to 1877 * begin with? Or maybe phy was isolated? 1878 */ 1879 int ctl = phy_read(phydev, MII_BMCR); 1880 1881 if (ctl < 0) 1882 return ctl; 1883 1884 if (!(ctl & BMCR_ANENABLE) || (ctl & BMCR_ISOLATE)) 1885 changed = 1; /* do restart aneg */ 1886 } 1887 1888 /* Only restart aneg if we are advertising something different 1889 * than we were before. 1890 */ 1891 if (changed > 0) 1892 return genphy_restart_aneg(phydev); 1893 1894 return 0; 1895 } 1896 EXPORT_SYMBOL(genphy_c37_config_aneg); 1897 1898 /** 1899 * genphy_aneg_done - return auto-negotiation status 1900 * @phydev: target phy_device struct 1901 * 1902 * Description: Reads the status register and returns 0 either if 1903 * auto-negotiation is incomplete, or if there was an error. 1904 * Returns BMSR_ANEGCOMPLETE if auto-negotiation is done. 1905 */ 1906 int genphy_aneg_done(struct phy_device *phydev) 1907 { 1908 int retval = phy_read(phydev, MII_BMSR); 1909 1910 return (retval < 0) ? retval : (retval & BMSR_ANEGCOMPLETE); 1911 } 1912 EXPORT_SYMBOL(genphy_aneg_done); 1913 1914 /** 1915 * genphy_update_link - update link status in @phydev 1916 * @phydev: target phy_device struct 1917 * 1918 * Description: Update the value in phydev->link to reflect the 1919 * current link value. In order to do this, we need to read 1920 * the status register twice, keeping the second value. 1921 */ 1922 int genphy_update_link(struct phy_device *phydev) 1923 { 1924 int status = 0, bmcr; 1925 1926 bmcr = phy_read(phydev, MII_BMCR); 1927 if (bmcr < 0) 1928 return bmcr; 1929 1930 /* Autoneg is being started, therefore disregard BMSR value and 1931 * report link as down. 1932 */ 1933 if (bmcr & BMCR_ANRESTART) 1934 goto done; 1935 1936 /* The link state is latched low so that momentary link 1937 * drops can be detected. Do not double-read the status 1938 * in polling mode to detect such short link drops. 1939 */ 1940 if (!phy_polling_mode(phydev)) { 1941 status = phy_read(phydev, MII_BMSR); 1942 if (status < 0) 1943 return status; 1944 else if (status & BMSR_LSTATUS) 1945 goto done; 1946 } 1947 1948 /* Read link and autonegotiation status */ 1949 status = phy_read(phydev, MII_BMSR); 1950 if (status < 0) 1951 return status; 1952 done: 1953 phydev->link = status & BMSR_LSTATUS ? 1 : 0; 1954 phydev->autoneg_complete = status & BMSR_ANEGCOMPLETE ? 1 : 0; 1955 1956 /* Consider the case that autoneg was started and "aneg complete" 1957 * bit has been reset, but "link up" bit not yet. 1958 */ 1959 if (phydev->autoneg == AUTONEG_ENABLE && !phydev->autoneg_complete) 1960 phydev->link = 0; 1961 1962 return 0; 1963 } 1964 EXPORT_SYMBOL(genphy_update_link); 1965 1966 int genphy_read_lpa(struct phy_device *phydev) 1967 { 1968 int lpa, lpagb; 1969 1970 if (phydev->autoneg == AUTONEG_ENABLE) { 1971 if (!phydev->autoneg_complete) { 1972 mii_stat1000_mod_linkmode_lpa_t(phydev->lp_advertising, 1973 0); 1974 mii_lpa_mod_linkmode_lpa_t(phydev->lp_advertising, 0); 1975 return 0; 1976 } 1977 1978 if (phydev->is_gigabit_capable) { 1979 lpagb = phy_read(phydev, MII_STAT1000); 1980 if (lpagb < 0) 1981 return lpagb; 1982 1983 if (lpagb & LPA_1000MSFAIL) { 1984 int adv = phy_read(phydev, MII_CTRL1000); 1985 1986 if (adv < 0) 1987 return adv; 1988 1989 if (adv & CTL1000_ENABLE_MASTER) 1990 phydev_err(phydev, "Master/Slave resolution failed, maybe conflicting manual settings?\n"); 1991 else 1992 phydev_err(phydev, "Master/Slave resolution failed\n"); 1993 return -ENOLINK; 1994 } 1995 1996 mii_stat1000_mod_linkmode_lpa_t(phydev->lp_advertising, 1997 lpagb); 1998 } 1999 2000 lpa = phy_read(phydev, MII_LPA); 2001 if (lpa < 0) 2002 return lpa; 2003 2004 mii_lpa_mod_linkmode_lpa_t(phydev->lp_advertising, lpa); 2005 } else { 2006 linkmode_zero(phydev->lp_advertising); 2007 } 2008 2009 return 0; 2010 } 2011 EXPORT_SYMBOL(genphy_read_lpa); 2012 2013 /** 2014 * genphy_read_status_fixed - read the link parameters for !aneg mode 2015 * @phydev: target phy_device struct 2016 * 2017 * Read the current duplex and speed state for a PHY operating with 2018 * autonegotiation disabled. 2019 */ 2020 int genphy_read_status_fixed(struct phy_device *phydev) 2021 { 2022 int bmcr = phy_read(phydev, MII_BMCR); 2023 2024 if (bmcr < 0) 2025 return bmcr; 2026 2027 if (bmcr & BMCR_FULLDPLX) 2028 phydev->duplex = DUPLEX_FULL; 2029 else 2030 phydev->duplex = DUPLEX_HALF; 2031 2032 if (bmcr & BMCR_SPEED1000) 2033 phydev->speed = SPEED_1000; 2034 else if (bmcr & BMCR_SPEED100) 2035 phydev->speed = SPEED_100; 2036 else 2037 phydev->speed = SPEED_10; 2038 2039 return 0; 2040 } 2041 EXPORT_SYMBOL(genphy_read_status_fixed); 2042 2043 /** 2044 * genphy_read_status - check the link status and update current link state 2045 * @phydev: target phy_device struct 2046 * 2047 * Description: Check the link, then figure out the current state 2048 * by comparing what we advertise with what the link partner 2049 * advertises. Start by checking the gigabit possibilities, 2050 * then move on to 10/100. 2051 */ 2052 int genphy_read_status(struct phy_device *phydev) 2053 { 2054 int err, old_link = phydev->link; 2055 2056 /* Update the link, but return if there was an error */ 2057 err = genphy_update_link(phydev); 2058 if (err) 2059 return err; 2060 2061 /* why bother the PHY if nothing can have changed */ 2062 if (phydev->autoneg == AUTONEG_ENABLE && old_link && phydev->link) 2063 return 0; 2064 2065 phydev->speed = SPEED_UNKNOWN; 2066 phydev->duplex = DUPLEX_UNKNOWN; 2067 phydev->pause = 0; 2068 phydev->asym_pause = 0; 2069 2070 err = genphy_read_lpa(phydev); 2071 if (err < 0) 2072 return err; 2073 2074 if (phydev->autoneg == AUTONEG_ENABLE && phydev->autoneg_complete) { 2075 phy_resolve_aneg_linkmode(phydev); 2076 } else if (phydev->autoneg == AUTONEG_DISABLE) { 2077 err = genphy_read_status_fixed(phydev); 2078 if (err < 0) 2079 return err; 2080 } 2081 2082 return 0; 2083 } 2084 EXPORT_SYMBOL(genphy_read_status); 2085 2086 /** 2087 * genphy_c37_read_status - check the link status and update current link state 2088 * @phydev: target phy_device struct 2089 * 2090 * Description: Check the link, then figure out the current state 2091 * by comparing what we advertise with what the link partner 2092 * advertises. This function is for Clause 37 1000Base-X mode. 2093 */ 2094 int genphy_c37_read_status(struct phy_device *phydev) 2095 { 2096 int lpa, err, old_link = phydev->link; 2097 2098 /* Update the link, but return if there was an error */ 2099 err = genphy_update_link(phydev); 2100 if (err) 2101 return err; 2102 2103 /* why bother the PHY if nothing can have changed */ 2104 if (phydev->autoneg == AUTONEG_ENABLE && old_link && phydev->link) 2105 return 0; 2106 2107 phydev->duplex = DUPLEX_UNKNOWN; 2108 phydev->pause = 0; 2109 phydev->asym_pause = 0; 2110 2111 if (phydev->autoneg == AUTONEG_ENABLE && phydev->autoneg_complete) { 2112 lpa = phy_read(phydev, MII_LPA); 2113 if (lpa < 0) 2114 return lpa; 2115 2116 linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, 2117 phydev->lp_advertising, lpa & LPA_LPACK); 2118 linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT, 2119 phydev->lp_advertising, lpa & LPA_1000XFULL); 2120 linkmode_mod_bit(ETHTOOL_LINK_MODE_Pause_BIT, 2121 phydev->lp_advertising, lpa & LPA_1000XPAUSE); 2122 linkmode_mod_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 2123 phydev->lp_advertising, 2124 lpa & LPA_1000XPAUSE_ASYM); 2125 2126 phy_resolve_aneg_linkmode(phydev); 2127 } else if (phydev->autoneg == AUTONEG_DISABLE) { 2128 int bmcr = phy_read(phydev, MII_BMCR); 2129 2130 if (bmcr < 0) 2131 return bmcr; 2132 2133 if (bmcr & BMCR_FULLDPLX) 2134 phydev->duplex = DUPLEX_FULL; 2135 else 2136 phydev->duplex = DUPLEX_HALF; 2137 } 2138 2139 return 0; 2140 } 2141 EXPORT_SYMBOL(genphy_c37_read_status); 2142 2143 /** 2144 * genphy_soft_reset - software reset the PHY via BMCR_RESET bit 2145 * @phydev: target phy_device struct 2146 * 2147 * Description: Perform a software PHY reset using the standard 2148 * BMCR_RESET bit and poll for the reset bit to be cleared. 2149 * 2150 * Returns: 0 on success, < 0 on failure 2151 */ 2152 int genphy_soft_reset(struct phy_device *phydev) 2153 { 2154 u16 res = BMCR_RESET; 2155 int ret; 2156 2157 if (phydev->autoneg == AUTONEG_ENABLE) 2158 res |= BMCR_ANRESTART; 2159 2160 ret = phy_modify(phydev, MII_BMCR, BMCR_ISOLATE, res); 2161 if (ret < 0) 2162 return ret; 2163 2164 ret = phy_poll_reset(phydev); 2165 if (ret) 2166 return ret; 2167 2168 /* BMCR may be reset to defaults */ 2169 if (phydev->autoneg == AUTONEG_DISABLE) 2170 ret = genphy_setup_forced(phydev); 2171 2172 return ret; 2173 } 2174 EXPORT_SYMBOL(genphy_soft_reset); 2175 2176 /** 2177 * genphy_read_abilities - read PHY abilities from Clause 22 registers 2178 * @phydev: target phy_device struct 2179 * 2180 * Description: Reads the PHY's abilities and populates 2181 * phydev->supported accordingly. 2182 * 2183 * Returns: 0 on success, < 0 on failure 2184 */ 2185 int genphy_read_abilities(struct phy_device *phydev) 2186 { 2187 int val; 2188 2189 linkmode_set_bit_array(phy_basic_ports_array, 2190 ARRAY_SIZE(phy_basic_ports_array), 2191 phydev->supported); 2192 2193 val = phy_read(phydev, MII_BMSR); 2194 if (val < 0) 2195 return val; 2196 2197 linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, phydev->supported, 2198 val & BMSR_ANEGCAPABLE); 2199 2200 linkmode_mod_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT, phydev->supported, 2201 val & BMSR_100FULL); 2202 linkmode_mod_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT, phydev->supported, 2203 val & BMSR_100HALF); 2204 linkmode_mod_bit(ETHTOOL_LINK_MODE_10baseT_Full_BIT, phydev->supported, 2205 val & BMSR_10FULL); 2206 linkmode_mod_bit(ETHTOOL_LINK_MODE_10baseT_Half_BIT, phydev->supported, 2207 val & BMSR_10HALF); 2208 2209 if (val & BMSR_ESTATEN) { 2210 val = phy_read(phydev, MII_ESTATUS); 2211 if (val < 0) 2212 return val; 2213 2214 linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT, 2215 phydev->supported, val & ESTATUS_1000_TFULL); 2216 linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT, 2217 phydev->supported, val & ESTATUS_1000_THALF); 2218 linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT, 2219 phydev->supported, val & ESTATUS_1000_XFULL); 2220 } 2221 2222 return 0; 2223 } 2224 EXPORT_SYMBOL(genphy_read_abilities); 2225 2226 /* This is used for the phy device which doesn't support the MMD extended 2227 * register access, but it does have side effect when we are trying to access 2228 * the MMD register via indirect method. 2229 */ 2230 int genphy_read_mmd_unsupported(struct phy_device *phdev, int devad, u16 regnum) 2231 { 2232 return -EOPNOTSUPP; 2233 } 2234 EXPORT_SYMBOL(genphy_read_mmd_unsupported); 2235 2236 int genphy_write_mmd_unsupported(struct phy_device *phdev, int devnum, 2237 u16 regnum, u16 val) 2238 { 2239 return -EOPNOTSUPP; 2240 } 2241 EXPORT_SYMBOL(genphy_write_mmd_unsupported); 2242 2243 int genphy_suspend(struct phy_device *phydev) 2244 { 2245 return phy_set_bits(phydev, MII_BMCR, BMCR_PDOWN); 2246 } 2247 EXPORT_SYMBOL(genphy_suspend); 2248 2249 int genphy_resume(struct phy_device *phydev) 2250 { 2251 return phy_clear_bits(phydev, MII_BMCR, BMCR_PDOWN); 2252 } 2253 EXPORT_SYMBOL(genphy_resume); 2254 2255 int genphy_loopback(struct phy_device *phydev, bool enable) 2256 { 2257 return phy_modify(phydev, MII_BMCR, BMCR_LOOPBACK, 2258 enable ? BMCR_LOOPBACK : 0); 2259 } 2260 EXPORT_SYMBOL(genphy_loopback); 2261 2262 /** 2263 * phy_remove_link_mode - Remove a supported link mode 2264 * @phydev: phy_device structure to remove link mode from 2265 * @link_mode: Link mode to be removed 2266 * 2267 * Description: Some MACs don't support all link modes which the PHY 2268 * does. e.g. a 1G MAC often does not support 1000Half. Add a helper 2269 * to remove a link mode. 2270 */ 2271 void phy_remove_link_mode(struct phy_device *phydev, u32 link_mode) 2272 { 2273 linkmode_clear_bit(link_mode, phydev->supported); 2274 phy_advertise_supported(phydev); 2275 } 2276 EXPORT_SYMBOL(phy_remove_link_mode); 2277 2278 static void phy_copy_pause_bits(unsigned long *dst, unsigned long *src) 2279 { 2280 linkmode_mod_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, dst, 2281 linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, src)); 2282 linkmode_mod_bit(ETHTOOL_LINK_MODE_Pause_BIT, dst, 2283 linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT, src)); 2284 } 2285 2286 /** 2287 * phy_advertise_supported - Advertise all supported modes 2288 * @phydev: target phy_device struct 2289 * 2290 * Description: Called to advertise all supported modes, doesn't touch 2291 * pause mode advertising. 2292 */ 2293 void phy_advertise_supported(struct phy_device *phydev) 2294 { 2295 __ETHTOOL_DECLARE_LINK_MODE_MASK(new); 2296 2297 linkmode_copy(new, phydev->supported); 2298 phy_copy_pause_bits(new, phydev->advertising); 2299 linkmode_copy(phydev->advertising, new); 2300 } 2301 EXPORT_SYMBOL(phy_advertise_supported); 2302 2303 /** 2304 * phy_support_sym_pause - Enable support of symmetrical pause 2305 * @phydev: target phy_device struct 2306 * 2307 * Description: Called by the MAC to indicate is supports symmetrical 2308 * Pause, but not asym pause. 2309 */ 2310 void phy_support_sym_pause(struct phy_device *phydev) 2311 { 2312 linkmode_clear_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, phydev->supported); 2313 phy_copy_pause_bits(phydev->advertising, phydev->supported); 2314 } 2315 EXPORT_SYMBOL(phy_support_sym_pause); 2316 2317 /** 2318 * phy_support_asym_pause - Enable support of asym pause 2319 * @phydev: target phy_device struct 2320 * 2321 * Description: Called by the MAC to indicate is supports Asym Pause. 2322 */ 2323 void phy_support_asym_pause(struct phy_device *phydev) 2324 { 2325 phy_copy_pause_bits(phydev->advertising, phydev->supported); 2326 } 2327 EXPORT_SYMBOL(phy_support_asym_pause); 2328 2329 /** 2330 * phy_set_sym_pause - Configure symmetric Pause 2331 * @phydev: target phy_device struct 2332 * @rx: Receiver Pause is supported 2333 * @tx: Transmit Pause is supported 2334 * @autoneg: Auto neg should be used 2335 * 2336 * Description: Configure advertised Pause support depending on if 2337 * receiver pause and pause auto neg is supported. Generally called 2338 * from the set_pauseparam .ndo. 2339 */ 2340 void phy_set_sym_pause(struct phy_device *phydev, bool rx, bool tx, 2341 bool autoneg) 2342 { 2343 linkmode_clear_bit(ETHTOOL_LINK_MODE_Pause_BIT, phydev->supported); 2344 2345 if (rx && tx && autoneg) 2346 linkmode_set_bit(ETHTOOL_LINK_MODE_Pause_BIT, 2347 phydev->supported); 2348 2349 linkmode_copy(phydev->advertising, phydev->supported); 2350 } 2351 EXPORT_SYMBOL(phy_set_sym_pause); 2352 2353 /** 2354 * phy_set_asym_pause - Configure Pause and Asym Pause 2355 * @phydev: target phy_device struct 2356 * @rx: Receiver Pause is supported 2357 * @tx: Transmit Pause is supported 2358 * 2359 * Description: Configure advertised Pause support depending on if 2360 * transmit and receiver pause is supported. If there has been a 2361 * change in adverting, trigger a new autoneg. Generally called from 2362 * the set_pauseparam .ndo. 2363 */ 2364 void phy_set_asym_pause(struct phy_device *phydev, bool rx, bool tx) 2365 { 2366 __ETHTOOL_DECLARE_LINK_MODE_MASK(oldadv); 2367 2368 linkmode_copy(oldadv, phydev->advertising); 2369 2370 linkmode_clear_bit(ETHTOOL_LINK_MODE_Pause_BIT, 2371 phydev->advertising); 2372 linkmode_clear_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 2373 phydev->advertising); 2374 2375 if (rx) { 2376 linkmode_set_bit(ETHTOOL_LINK_MODE_Pause_BIT, 2377 phydev->advertising); 2378 linkmode_set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 2379 phydev->advertising); 2380 } 2381 2382 if (tx) 2383 linkmode_change_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 2384 phydev->advertising); 2385 2386 if (!linkmode_equal(oldadv, phydev->advertising) && 2387 phydev->autoneg) 2388 phy_start_aneg(phydev); 2389 } 2390 EXPORT_SYMBOL(phy_set_asym_pause); 2391 2392 /** 2393 * phy_validate_pause - Test if the PHY/MAC support the pause configuration 2394 * @phydev: phy_device struct 2395 * @pp: requested pause configuration 2396 * 2397 * Description: Test if the PHY/MAC combination supports the Pause 2398 * configuration the user is requesting. Returns True if it is 2399 * supported, false otherwise. 2400 */ 2401 bool phy_validate_pause(struct phy_device *phydev, 2402 struct ethtool_pauseparam *pp) 2403 { 2404 if (!linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT, 2405 phydev->supported) && pp->rx_pause) 2406 return false; 2407 2408 if (!linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 2409 phydev->supported) && 2410 pp->rx_pause != pp->tx_pause) 2411 return false; 2412 2413 return true; 2414 } 2415 EXPORT_SYMBOL(phy_validate_pause); 2416 2417 static bool phy_drv_supports_irq(struct phy_driver *phydrv) 2418 { 2419 return phydrv->config_intr && phydrv->ack_interrupt; 2420 } 2421 2422 /** 2423 * phy_probe - probe and init a PHY device 2424 * @dev: device to probe and init 2425 * 2426 * Description: Take care of setting up the phy_device structure, 2427 * set the state to READY (the driver's init function should 2428 * set it to STARTING if needed). 2429 */ 2430 static int phy_probe(struct device *dev) 2431 { 2432 struct phy_device *phydev = to_phy_device(dev); 2433 struct device_driver *drv = phydev->mdio.dev.driver; 2434 struct phy_driver *phydrv = to_phy_driver(drv); 2435 int err = 0; 2436 2437 phydev->drv = phydrv; 2438 2439 /* Disable the interrupt if the PHY doesn't support it 2440 * but the interrupt is still a valid one 2441 */ 2442 if (!phy_drv_supports_irq(phydrv) && phy_interrupt_is_valid(phydev)) 2443 phydev->irq = PHY_POLL; 2444 2445 if (phydrv->flags & PHY_IS_INTERNAL) 2446 phydev->is_internal = true; 2447 2448 mutex_lock(&phydev->lock); 2449 2450 if (phydev->drv->probe) { 2451 /* Deassert the reset signal */ 2452 phy_device_reset(phydev, 0); 2453 2454 err = phydev->drv->probe(phydev); 2455 if (err) { 2456 /* Assert the reset signal */ 2457 phy_device_reset(phydev, 1); 2458 goto out; 2459 } 2460 } 2461 2462 /* Start out supporting everything. Eventually, 2463 * a controller will attach, and may modify one 2464 * or both of these values 2465 */ 2466 if (phydrv->features) { 2467 linkmode_copy(phydev->supported, phydrv->features); 2468 } else if (phydrv->get_features) { 2469 err = phydrv->get_features(phydev); 2470 } else if (phydev->is_c45) { 2471 err = genphy_c45_pma_read_abilities(phydev); 2472 } else { 2473 err = genphy_read_abilities(phydev); 2474 } 2475 2476 if (err) 2477 goto out; 2478 2479 if (!linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, 2480 phydev->supported)) 2481 phydev->autoneg = 0; 2482 2483 if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT, 2484 phydev->supported)) 2485 phydev->is_gigabit_capable = 1; 2486 if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT, 2487 phydev->supported)) 2488 phydev->is_gigabit_capable = 1; 2489 2490 of_set_phy_supported(phydev); 2491 phy_advertise_supported(phydev); 2492 2493 /* Get the EEE modes we want to prohibit. We will ask 2494 * the PHY stop advertising these mode later on 2495 */ 2496 of_set_phy_eee_broken(phydev); 2497 2498 /* The Pause Frame bits indicate that the PHY can support passing 2499 * pause frames. During autonegotiation, the PHYs will determine if 2500 * they should allow pause frames to pass. The MAC driver should then 2501 * use that result to determine whether to enable flow control via 2502 * pause frames. 2503 * 2504 * Normally, PHY drivers should not set the Pause bits, and instead 2505 * allow phylib to do that. However, there may be some situations 2506 * (e.g. hardware erratum) where the driver wants to set only one 2507 * of these bits. 2508 */ 2509 if (!test_bit(ETHTOOL_LINK_MODE_Pause_BIT, phydev->supported) && 2510 !test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, phydev->supported)) { 2511 linkmode_set_bit(ETHTOOL_LINK_MODE_Pause_BIT, 2512 phydev->supported); 2513 linkmode_set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 2514 phydev->supported); 2515 } 2516 2517 /* Set the state to READY by default */ 2518 phydev->state = PHY_READY; 2519 2520 out: 2521 mutex_unlock(&phydev->lock); 2522 2523 return err; 2524 } 2525 2526 static int phy_remove(struct device *dev) 2527 { 2528 struct phy_device *phydev = to_phy_device(dev); 2529 2530 cancel_delayed_work_sync(&phydev->state_queue); 2531 2532 mutex_lock(&phydev->lock); 2533 phydev->state = PHY_DOWN; 2534 mutex_unlock(&phydev->lock); 2535 2536 sfp_bus_del_upstream(phydev->sfp_bus); 2537 phydev->sfp_bus = NULL; 2538 2539 if (phydev->drv && phydev->drv->remove) { 2540 phydev->drv->remove(phydev); 2541 2542 /* Assert the reset signal */ 2543 phy_device_reset(phydev, 1); 2544 } 2545 phydev->drv = NULL; 2546 2547 return 0; 2548 } 2549 2550 /** 2551 * phy_driver_register - register a phy_driver with the PHY layer 2552 * @new_driver: new phy_driver to register 2553 * @owner: module owning this PHY 2554 */ 2555 int phy_driver_register(struct phy_driver *new_driver, struct module *owner) 2556 { 2557 int retval; 2558 2559 /* Either the features are hard coded, or dynamically 2560 * determined. It cannot be both. 2561 */ 2562 if (WARN_ON(new_driver->features && new_driver->get_features)) { 2563 pr_err("%s: features and get_features must not both be set\n", 2564 new_driver->name); 2565 return -EINVAL; 2566 } 2567 2568 new_driver->mdiodrv.flags |= MDIO_DEVICE_IS_PHY; 2569 new_driver->mdiodrv.driver.name = new_driver->name; 2570 new_driver->mdiodrv.driver.bus = &mdio_bus_type; 2571 new_driver->mdiodrv.driver.probe = phy_probe; 2572 new_driver->mdiodrv.driver.remove = phy_remove; 2573 new_driver->mdiodrv.driver.owner = owner; 2574 2575 retval = driver_register(&new_driver->mdiodrv.driver); 2576 if (retval) { 2577 pr_err("%s: Error %d in registering driver\n", 2578 new_driver->name, retval); 2579 2580 return retval; 2581 } 2582 2583 pr_debug("%s: Registered new driver\n", new_driver->name); 2584 2585 return 0; 2586 } 2587 EXPORT_SYMBOL(phy_driver_register); 2588 2589 int phy_drivers_register(struct phy_driver *new_driver, int n, 2590 struct module *owner) 2591 { 2592 int i, ret = 0; 2593 2594 for (i = 0; i < n; i++) { 2595 ret = phy_driver_register(new_driver + i, owner); 2596 if (ret) { 2597 while (i-- > 0) 2598 phy_driver_unregister(new_driver + i); 2599 break; 2600 } 2601 } 2602 return ret; 2603 } 2604 EXPORT_SYMBOL(phy_drivers_register); 2605 2606 void phy_driver_unregister(struct phy_driver *drv) 2607 { 2608 driver_unregister(&drv->mdiodrv.driver); 2609 } 2610 EXPORT_SYMBOL(phy_driver_unregister); 2611 2612 void phy_drivers_unregister(struct phy_driver *drv, int n) 2613 { 2614 int i; 2615 2616 for (i = 0; i < n; i++) 2617 phy_driver_unregister(drv + i); 2618 } 2619 EXPORT_SYMBOL(phy_drivers_unregister); 2620 2621 static struct phy_driver genphy_driver = { 2622 .phy_id = 0xffffffff, 2623 .phy_id_mask = 0xffffffff, 2624 .name = "Generic PHY", 2625 .soft_reset = genphy_no_soft_reset, 2626 .get_features = genphy_read_abilities, 2627 .suspend = genphy_suspend, 2628 .resume = genphy_resume, 2629 .set_loopback = genphy_loopback, 2630 }; 2631 2632 static int __init phy_init(void) 2633 { 2634 int rc; 2635 2636 rc = mdio_bus_init(); 2637 if (rc) 2638 return rc; 2639 2640 features_init(); 2641 2642 rc = phy_driver_register(&genphy_c45_driver, THIS_MODULE); 2643 if (rc) 2644 goto err_c45; 2645 2646 rc = phy_driver_register(&genphy_driver, THIS_MODULE); 2647 if (rc) { 2648 phy_driver_unregister(&genphy_c45_driver); 2649 err_c45: 2650 mdio_bus_exit(); 2651 } 2652 2653 return rc; 2654 } 2655 2656 static void __exit phy_exit(void) 2657 { 2658 phy_driver_unregister(&genphy_c45_driver); 2659 phy_driver_unregister(&genphy_driver); 2660 mdio_bus_exit(); 2661 } 2662 2663 subsys_initcall(phy_init); 2664 module_exit(phy_exit); 2665